code: def __init__(
      self, signal_handlers: Union[List[_HANDLER], _HANDLER]
  ) -> None:
      if not isinstance(signal_handlers, list):
          signal_handlers = [signal_handlers]
      self.signal_handlers = signal_handlers
  
imports: import logging
  import os
  import re
  import signal
  import sys
  import threading
  from subprocess import call
  from types import FrameType
  from typing import Any, Callable, Dict, List, Set, Union
  import lightning.pytorch
  from lightning.fabric.plugins.environments import SLURMEnvironment
  from lightning.fabric.utilities.imports import _IS_WINDOWS, _PYTHON_GREATER_EQUAL_3_8_0
  from lightning.pytorch.utilities.rank_zero import rank_prefixed_message, rank_zero_info
label_desc: Use image node_id 1 to create a new _HandlersCompose object  with example: obj = _HandlersCompose(signal_handlers)